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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2015年52 No.4

Population dynamics of the brown planthopper Nilaparvatalugens (Stal) in late rice in northern Guangdong
Author of the article:FANG Fan1** CHEN Xiao1 CHEN Yu-Tuo2 LU Ming-Hong3 ZHAI Bao-Ping1***
Author's Workplace:1. Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Insect Pests, Ministry of Education, Ministry of Agriculture of China, Nanjing 210095, China;2. Guangdong Forecasting and Control Center of Agricultural Pests, Guangzhou 510500, China; 3. National Agricultural Technical Extension and Service Center, Beijing 100125, China
Key Words:brown planthopper, autumn migration, landing mechanism, out-break
Abstract: [Objectives] Northern Guangdong is one of the most important autumn migration areas of the brown planthopper Nilaparvata lugens (Stål) (BPH).Understanding the factors influencing the autumn immigration of the BPH inlate rice fields in northern Guangdong will therefore provide useful information for forecasting outbreaks of this pest. [Methods] The source areas of the autumn migration of the BPH were studied by trajectory analysis based on daily light-trap catches from 2006 to 2012. We used NCEP-NCAR to reanalyze data with GrADS to identify key climatic factors affecting the migration of the BPH in autumn 2011. [Conclusion]  (1) The source areas of BPHs in northwestern Guangdong were mainly southern Hunan, southern Fujian and Jiangxi. However, the source areas of BPHs in northeastern Guangdong were southern Fujian, southern Jiangxi and eastern Guangdong. The difference in the source populations of these two parts of Guangdong is due to terrain. (2) Factors affecting the migration of the BPH in autumn 2011 were analyzed by GrADS. The results show that the low level jet-stream carried BPHs to the south, and that wind shear and heavy rainfall were key factors affecting the concentrated landing of BPHs. (3) The two autumn migration peaks from central and east-central China to northern Guangdong in 2011 occurred in late August and early September, and in late September and early October. Rice plants are vulnerable to this pest from the tillering to the heading stage; the autumn migration peak aggravated the damage to late rice crops. (4) Suitable temperature and rainfall in source areas in the autumn of 2011 were key factors responsible for the increased reproduction of BPH.
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